I noticed yesterday evening that Massinga has patches of hair loss on her hind legs and her thigh.  I'm not sure what could cause this, it could be a number of things as she had a very busy day yesterday: she had her first rabies jab, her disemper, a deworming pill and also her ears cleaned. When we got home after the vets I gave her a bath, using shampoo for dogs that says it's suitable for puppies.  I'm wondering if the most likely cause is her shampoo.  I have changed her diet over the last few days, but only by adding boiled chicken and the juices to her dry biscuits.  I did feed her tinned tuna in oil a few days ago, which I have been warned since not to feed her, could that be the cause?  Any advice will be gratefully accepted.  I've recently moved from the UK to Mozambique, therefore I'm relying on this forum and the local vet for advice!!  Many thanks.

It could be anything, the change in water, allergic to the sun, allergic to anything!
I noticed a bald patch the sixe of my finger on one of my bitches last week. I took her to the vet, "is it ringworm? Take a scrape". Three days later another patch, and another, then another.
She is now in a full blow of her coat, 7 weeks early!
It could be nothing, it could be something very serious. I'd get it all checked out ASAP, better to be safe.