Jack Russells On Three Legs

[arthurfarrow]

Why do Jack Russell terriers sometimes walk on three legs, taking one fo their rear ones off the ground?

[Mamyalynne]

It's very common and there's lots of speculation but not much real explanation.

[hereIam]

My friend once had a chihauaha (spelling?) that did this all the time, lovely little dog she was.

[RATTER15]

Its quite a common thing, I have had it with Jack Russells and I had a Westie that done the same.

[zylaphone]

I had two jacks that did that, according to my vet their “knee” dislocates for a while, does no harm

[Buenchico]

'Patella luxation' seems to be the favoured theory.

e.g. here:
https://www.petforums.co.uk/threads/why-do-jack-russells-hop-on-three-legs.267664/