If they are twelve months old or more and they are not terminally ill, you can sacrifice them.

I bought 2 lambs 10 months before eid ul adha . According to seller of lambs, they were 3 month old when I bought..as per calendar. I am taking care of goats in my own home last 10 months and as per calculation of months both are 12 months plus. But currently no teeth change and health of the body just below normal ,looking still kids. My Question : Can I perform Qurbani for the day of eid ul adha as per sunnah guide line or what should I do if goats are not meeting qurbani criteria?