I love my Lucky Dog Fi collar!! It fits my boy wonderfully and has plenty of room to expand as he is still growing at a year old. He is a GSD mix that I rescued and 2 days later he started limping, bad. Turns out it was osteosarcoma and after much deliberation, as his quality of life is paramount, we decided to go through with the total right front leg amputation. It’s been a little over 2 months since the surgery and he is doing great!! He is by no means out of the woods yet, as this cancer commonly spreads to lungs, even after amputation. So with frequent check ups with my wonderful vet, I hope to have Buddie for a long, long time!! He is so happy and healthy and full of life!! He looks great in his new collar and has adapted very quickly to life as a “tripawd”. Thank you for making such a great product and I hope he wears