so my little Isbar "Runt" has seemingly out of nowhere developed a lame right leg. no visible or palpable injury, no bumblefoot, no sickness that i can sus out, and she's not egg bound. i have her out front, in a large dog kennel with a tarp over it because of all the rain lately. she has access to the yard and uses it to hop around and eat and drink. her condition is not improving as far as i can tell and it's been almost 3 weeks now. suggestions?