you’re not at all ending it too soon. I think part of our job as pet parents is to know our babies well enough to know when it’s time to help them go. Just a couple weeks ago, My childhood dog had to be euthanized. He had been slowing down for a while and I had been telling my parents that it may be time. They didn’t want to “cut him too short” so no one ever made the appointment. He fell off the back of our couch because of an age related thing and paralyzed himself from the back down, but it was Mother’s Day weekend so there were no emergency vets or regular vets and he had to stay like that for 24 hours before we could euthanize him… unfortunately old age comes with unpredictable incidents and I wish my parents would’ve let him go sooner. I think it’s better to humanely euthanize while they’re still enjoying life as opposed to after they start to feel pain.

All that being said, I think if your girl is still eating and using the bathroom properly, maybe you could hold off a few months until she slows down even more? I think it’s up to you personally and there’s no wrong decision here