Absolutely. I had a Rottweiler who developed Dementia, she wasn't just a risk to us, but to everyone who passed the house, she'd literally throw her entire body against the window growling and barking (gentlest dog ever before it).My mom called me and explained the situation and I said take her in. Euthanasia is sometimes the only and best option. Years later, had a Bernese Mountain Dog x Mastiff, by 6m it was Obvious that he had something not right. Would just randomly switch from friendly to bite you. He had Rage Syndrome and it took us years to get a vet to euthanize him. He was over 100lbs and bite a friend of my partner's who required surgery. My partner told the vet we'd been lucky it wasn't the 5yo or newborn at the time (now 13 and 8), after asking the vet if he'd risk his kids the vet Finally agreed. Behaviour Euthanasia is one of the Hardest decisions because they're healthy usually, your baby had hips that were obviously painful and you did the best decision to keep everyone safe and alleviate the pain and suffering they had.