Hello, Elle!
I think many dogs are frightened by thunder.
I suppose vets can do little to help, other than offer good advice.
If you look up "unseen" in Chambers you will find "translation".
I have "Repton", too.
I had never heard of it, and there are hundreds of villages with schools named after them.
A couple of tips for the others.
1a, A three letter word for a horse, "fitter, needing a", being (a)bler", for a drink (which was new to me)
5a, The mountain is an "alp", with "a ca(t)".
5d, The queen is not ER, but Anne.
13a, "s" for "sons", work is "op", and anagram of "Malag(a)", lopped, for a tree.
16d, is the name of a FRench town. The river is the "Po".
Now, I hope these are a help, Elle!