There is a bug currently where you can feed dogs, but when you feed them, they dont seem to recover health.
How to reproduce: Try to feed a dog / wolf when it is hurt.
Device: Nvidia Sheild
Linked issues
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If you did not already, please remember to perform a search before creating a ticket to see if your bug hasn't already been reported.
This issue was reported previously as MCPE-8517; comment your experience there!
Already been report MANY times please research next time to see if a bug was reported