Cannibal Transspecies Creature

So yeah, it's possible. I'm not aware of any breeding projects for it though.

"FIGURE 1 ... (a) Salmiak solid black cat (aa/wsalwsal), (b) salmiak solid blue cat (diluted black, aa/dd/wsalwsal), (c) salmiak brown mackerel tabby (wsalwsal) (right) and his normal-colored brother heterozygous for salmiak (wsalw), (d) salmiak phenotype on a long-haired solid black cat (not genotyped), (e) salmiak solid black cat (aa/wsalwsal) and (f) salmiak phenotype on a tortoiseshell cat (not genotyped). Cat a was sequenced, and cats b, c and e were genotyped for salmiak. Photo credits: (a) Ari Kankainen and (b–e) courtesy of the cat owners."

When homozygous, roan is kinda similar to double-merle in dogs, causing micropthalmia (under-eveloped eyes), deafness, and a lack of pigment. It also causes deformities like missing teeth, uneven teeth, and splinter teeth, which means lethal white guinea pigs need to be on a have their teeth regularly clipped by a vet, and some need to be on a liquid diet

With a lot of extra care and attention, 'lethal whites' can live happy lives. Many owners adore their lethal whites and spoil them rotten. But if extra care is beyond you, euthanasia is the kindest option

There are colors that can look similar to roan, such as magpie and sepia/sable, and roan can be hard to spot on guinea pigs with a two-toned base color (especially if they're abyssinian or longhair). This is yet another reason that inexperienced people shouldn't be breeding guinea pigs.

Sources:

https://ask.ifas.ufl.edu/publication/UW468 “How Effective and Humane Is Trap-Neuter-Release (TNR) for Feral Cats?” 

https://pmc.ncbi.nlm.nih.gov/articles/PMC6523511/ “A Case of Letting the Cat out of The Bag—Why Trap-Neuter-Return Is Not an Ethical Solution for Stray Cat (Felis catus) Management” (also has a thousand references attached that are handy)

Not a reference so much as the human society actively admitting that TNR does nothing to decrease population, actively contributes to harming wildlife, and doesn’t actually help the cats in any way, just reduces some of the nuisance behavior that people complain about: https://www.animalhumanesociety.org/resource/real-impacts-trap-neuter-return

Unscientific from here on out as i don’t feel like trying to find the studies i read in like January of last year:

https://hahf.org/awake/the-trouble-with-trap-vaccinate-neuter-return/ “The Trouble With Trap-Neuter-Re (Abandon!) from the hillsborough animal health foundation, articles also link to studies

Animal Emergency and Referral Center of Minnesota. (2022, October 26). Indoor cats vs. outdoor cats. Animal Emergency & Referral Center of Minnesota. https://aercmn.com/indoor-cats-vs-outdoor-cats/

Campbell, V. (2017, January 25). The Obituary of the Stephens Island Wren. All About Birds. https://www.allaboutbirds.org/news/the-obituary-of-the-stephens-island-wren/

Castillo, D., & Clarke, A. L. (2003). Trap/neuter/release methods ineffective in controlling domestic cat “colonies” on public lands. Natural Areas Journal, 23(3).

Coe, S. T., Elmore, J. A., Elizondo, E. C., & Loss, S. R. (2021). Free-ranging domestic cat abundance and sterilization percentage following five years of a trap–neuter–return program. Wildlife Biology, 2021(1). https://doi.org/10.2981/wlb.00799

del Hoyo, J., Collar, N., Kirwan, G. M., & Sharpe, C. J. (2022, October 25). Guadalupe storm-petrel (Hydrobates Macrodactylus), version 1.2. Birds of the World. https://birdsoftheworld.org/bow/species/guspet/cur/introduction

Dickman, C. R., & Newsome, T. M. (2015). Individual hunting behaviour and prey specialisation in the house cat Felis catus: Implications for conservation and management. Applied Animal Behaviour Science, 173, 76–87. https://doi.org/10.1016/j.applanim.2014.09.021

Edge. (2019, June 19). Guadalupe storm-petrel. EDGE of Existence. https://www.edgeofexistence.org/species/guadalupe-storm-petrel/

Galbreath, R., & Brown, D. (2004). The tale of the lighthouse-keeper’s cat: Discovery and extinction of the Stephens Island wren (Traversia lyalli). Notornis, 51(4).

Hawai’i Department of Land and Natural Resources. (2025). Feral cats. Feral Cats. https://dlnr.hawaii.gov/hisc/info/invasive-species-profiles/feral-cats/#:~:text=Feral%20cats%20on%20islands%20have,kill%20approximately%202.4%20billion%20birds.

Loss, S. R., Will, T., & Marra, P. P. (2013). The impact of free-ranging domestic cats on wildlife of the United States. Nature Communications, 4(1). https://doi.org/10.1038/ncomms2380

McGregor, H., Legge, S., Jones, M. E., & Johnson, C. N. (2015). Feral cats are better killers in open habitats, revealed by animal-borne video. PLOS ONE, 10(8). https://doi.org/10.1371/journal.pone.0133915

Medina, F. M., Bonnaud, E., Vidal, E., Tershy, B. R., Zavaleta, E. S., Josh Donlan, C., Keitt, B. S., Corre, M., Horwath, S. V., & Nogales, M. (2011). A global review of the impacts of invasive cats on Island Endangered Vertebrates. Global Change Biology, 17(11), 3503–3510. https://doi.org/10.1111/j.1365-2486.2011.02464.x

National Research Council. (1992, January 1). Scientific Bases for the Preservation of the Hawaiian Crow. U.S. National Library of Medicine. https://www.ncbi.nlm.nih.gov/books/NBK235935/

NOAA. (2024, August 29). Toxoplasmosis and its effects on Hawaiʻi Marine Wildlife. NOAA Fisheries. https://www.fisheries.noaa.gov/pacific-islands/endangered-species-conservation/toxoplasmosis-and-its-effects-hawaii-marine

Read, J. L., Dickman, C. R., Boardman, W. S., & Lepczyk, C. A. (2020). Reply to Wolf et al.: Why trap-neuter-return (TNR) is not an ethical solution for Stray Cat Management. Animals, 10(9), 1525. https://doi.org/10.3390/ani10091525

Reed, L. (2022). The effects of free-roaming cats on native wildlife populations. Wildlife Rehabilitation Bulletin, 40(1), 17–21. https://doi.org/10.53607/wrb.v40.250

Salano, E. (2024, October 5). Eliciting the effect free roaming cats have on Native Hawaiian wildlife using stable isotope analysis. UKnowledge. https://uknowledge.uky.edu/biology_etds/103/ 

Steele, J. H., Thorpe, S. A., & Turekian, K. K. (2009). Encyclopedia of Ocean Sciences. Academic Press. 

My friend told me how he'd seen her before but she always vanished before he could catch her. He works far too many hours and is always tired so he couldn't prioritize catching this cat.

Three months pass with no sign of her. I go back with my partner to check on carcasses and this same little grey cat appears. This time, however, a tooth has been snapped off and her tongue is so badly cut that she can't keep it in her mouth. She was thin and dirty and screaming to please be given some food.

This time I couldn't look away. I asked my friend's girlfriend if I could borrow a cat carrier. She loaned me one and a tin of wet food that the grey cat willingly followed into the carrier. She didn't care at all about being put into the carrier - all she wanted was a hand on her. She'd arch up against the top just so my hand would rest on her back for a moment.

We drove through rush hour traffic to the only shelter still open. We knew we couldn't keep her and I couldn't stand the thought of putting her back out on the streets to die slowly.

The shelter couldn't take her. Her ear was clipped so she was a "community cat" and outside their ability to help. They tried desperately to offer alternatives to me as I cried over her carrier, knowing I couldn't take her home but also that if I didn't I couldn't live with the thought of her back on the streets.

I made a Hail Mary call to a local friend who is very connected in our city. They didn't have my number saved but answered all the same to hear me sobbing about a cat I'd found and to please help me find a place for her. Please. If I don't find something then she'll be alone on the streets again to die.

My friend came through. I could keep the cat in their garage overnight and in the morning my friend would be back in the city and could find someone to help the cat.

The shelter folk gave me a crate and some food - their hands were tied but they didn't want to leave me with nothing. They were good people doing the best they could in their own system. Community cats were ones they weren't allowed to "waste" resources on. Ostensibly they'd been dealt with and their fate decided. There was nothing the shelter folks were allowed to do for them.

I took the cat to my friend's garage. She was settled into a crate on towels, happy as a clam to be warm and safe. This was a cat made to be loved and to love, as she immediately began trying to groom one of my friend's roommates. He stayed in the garage with her, giving her food and water and in exchange having no say on whether she was in his lap or not. She was always in his lap.

Nobby Nobbs (so named for the only other character known to man that is as scrungly as she is) was then formally adopted by my friend. Her tongue has healed, her fur remains scrungly, and she's every bit the rabid love bug I suspected her to be when she came to me yelling to be pet.

She's a TNR cat. Someone thought they were doing her a kindness in that and if nothing else she didn't add kittens to the world but that doesn't negate the pain she suffered before I found her - the broken teeth, the lacerated tongue, the ulcerated cheeks, the flea-bald patchiness of her coat.

I say this as someone who adores this cat and has the privilege to see her loved and cherished: I wish she'd never had to suffer what she did. I wish people were alright making the harder call that leads to less misery on the side of the cats.

TNR is a polite fiction, nothing more. Just so the humans can pretend they've done right by the same cats they're letting loose to die miserably somewhere else. As long as the humans don't see it it's fine.

The shelter folks told me she's a community cat and that I could take her home and release her by my house. Then I could feed her myself and keep up with her and know where she was! I could still keep her, after a fashion.

I am not proud of how I snarled back that I would never exchange a quick death for a slow one. I would be giving her a different funeral plot, not giving her a life. Even near me she'd be just as vulnerable to the innumerable predators that find cats quite delicious, let alone cars and poisons and the other cruelties humans practice on stray cats.

She's the second stray cat I've met that when I held them the cat melted in my arms, purring and so desperately wanting to be loved. The first cat I was able to trap and take to a local shelter only to find when I called to check on him a day later that his health had been so terrible, so beyond help, that he'd been put down. All the love in that tiny body lost because the people I lived beside didn't care enough to trap the cats they had.

My partner was asleep. I woke her up to crawl into her arms and sob, my heart breaking for the stupidity of the humans who hadn't cared enough to grant this poor little cat the chance to be either an indoor cat, loved and cared for, or to grant him a quick death long before I met him. I've other stories of the cats they kept around, essentially feeding the poor souls to the predatory birds and wandering dogs that frequented our area.

From the article: