While I was mowing my lawn the other day I noticed a juvinile tree frog struggling to traverse the mulch bed around a maple tree in my front yard. Upon inspecting it I noticed it's right rear foot was missing and the injury appeared fresh. This leads me to believe I either stepped on it or ran it over while mowing. I caught it and placed it in a 1 gallon tank with coconut substrate and a small water dish. I built a little structure made up of sticks and the frog is pretty active moving throughout the tank and hanging out under and on the sticks. I bought some small crickets and placed them in with the frog but it shows no prey drive. Should I be worried and is there anything else I should do? The frogs mobility appears fine minus a foot it just ignores the crickets.