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Why is my dog acting strange, hiding, sad, and his back legs weak?

Updated On September 23rd, 2025

Pet's info: Dog | Jack Russell Terrier | Male | unneutered | 7 years old

Hi I have a jack Russel who’s 8 years old, he seems to be acting really strange lately. He keeps hiding and doesn’t want attention, this isn’t him at all, he’s always been a fuss pot and loves attention. He seeks really sad and his back legs look like they are caving in. He also keep circling to try and get comfy, can someone suggest what’s wrong with him?

2 Answers

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on November 25th, 2017

Thanks for using Petco Pet Education Center, formerly Petcoach! Sorry to hear that Jack does not feel well. These could all be signs of discomfort or pain. However, those signs are rather non-specific and while I agree with you that something is likely wrong with him, further work-up would be needed to know what is causing him to be unwell. I recommend that you have him evaluated by your veterinarian for further assessment. Likely diagnostics include bloodwork and radiographs if he appears to be in discomfort. Good luck and I hope he does well!

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1Pet Parents found this answer helpful

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    Answered By Daniel Fonza, DVM

    Veterinarian

    Published on December 10th, 2019

    Hi there and thank you for using Petco Pet Education Center, formerly Petcoach to address your concern. Based on the information you have provided, I would recommend having Mighty examined by a veterinarian so that the most appropriate diagnostic and treatment recommendations can be made. I would have his blood tested and consider abdominal xrays / ultrasound as well. I hope this helps!

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    1Pet Parents found this answer helpful

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