We welcomed two nine-week-old chuhuahuas into our home two days ago. Always the curious one, I checked each for craniosacral fascial strain. Since their four-pound mother carried four babies, I felt there might be some fetal compression.
Sure enough, one had a spinal lower rib twist that worked through in a few minutes. They both had great brain cycles so I expect them to be smart (especially about indoor potty training).
My pets have the perk of me as their friend. Dogs and cats have craniosacral fascial systems that may be worth checking.