We took our persian to the groomers today for the first time for them to bathe her, cut out some of her knots, and clip her nails. Since she came back she's been walking funny on her back legs and her tail moves from side to side. It doesn't seem like her back legs are weak or injured, just as though something is stuck up her bum so she's walking funny. What can I do? I don't know whether I should take her to the vet because she's an indoor cat and she had complete blood work done a month ago and it said she's fine. Any ideas??