I had an AB with that prob in the extreme he was like it in all his toes on both front legs and was crawling about on his knuckles till 4 months old , it was partialy genetic and partially diet based as he was fed crap before i got him then i put him on great food he had a grownth spurt to fast and bones grew faster than the tendons , it does all catch up in the end but a blandish diet not to high in protein helped , the dog did eventually come [bANNED TEXT] by about six months but thought it left him with a weekness there but he did have it in the extreme ! your pup dont look too bad lay of t