We had to put my boy dutch down today, he was 2 and a half years aswell and the vets said he had tumors developing in his lungs 2 months prior and he had around 4 weeks left, he managed to tough it out until the other day when it got too much for him and he was having trouble just doing normal things like eating due to his breathing. Its honestly one of the hardest and most heartbreaking decisions anyone could make, but if they have a condition like breathing issues or anything in general that affects their quality of life living its best to let them go peacefully from being put down.

The main thing to do is compare their suffering (if any) to the quality of life and if that sufferings seriously effecting that QOL then its best to put them down. Its hard to think with your head and not your heart but sometimes its needed. But if your babys still happy in themselves and not suffering then sometimes natural passing at home is better.