I am so very sorry to hear about your little Candy. My primary concern is an injury to the back, not necessarily doing something like jumping off the furniture and crying out, they can be walking around the house and have a strain/ sprain of their rib or back.
Ideal is to have your veterinarian evaluate your dog to definitively diagnose the problem and start on appropriate medication to control the discomfort (which these subtle signs are indicating). Until you are able to do this please restrict activity (which often they are already doing themselves but that means no steps/ stairs and only carrying to go potty) and rotating warm and cool compresses on the back in ten minute intervals to reduce pain and increase blood flow.
You can also do light circular massage up and down the back to stimulate blood flow if this is not too painful and will allow it.
To pick your dog up please use one hand between front legs and then scooping behind back legs to avoid pressure in the middle of the back. I have actually trained my little dogs to put their front legs on my forearm to minimize pressure on their backs and the associated discomfort because they too will cry out if picked up a certain way due to back pain.
I have two little dogs and both display these symptoms but yet otherwise act perfectly normal. I have a physical therapist that does massage and laser therapy on areas she has found that are tender and they are great for a while then slide backwards into these patterns again indicating their discomfort. Staff knows not to pick my dogs up unless I hand them over because they will cry if picked up certain ways. I can tell you my little girl dog will not jump up or hesitates to jump then Deanna the PT works on her and within minutes she is back to normal again!
Please let me know if you have any additional questions I can assist with. I hope you are able to get your little one comfortable soon, truly.
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