Petcucks are mentally ill, and pet-keeping is currently one of the biggest threats to White people, and the most unrecognized.
Pet-keeping has had a negative impact to White birth rates bigger than all racemixing combined.
For every mudshark or WMAF couple shitting out hybrid mutants there are like 5-10 Whites that didn't have kids because they were too busy wasting time and money on a dog, cats or some other pet parasite until their fertility window flew by.
It's literally the same as the cuckoo bird where the word cuck comes from: A brood parasite replacing your own kids and convincing you it's your child.
People who have pets but no kids of their own are cucks in the most literal sense of the word.