The most common and most likely answer to this crossword clue is the 10 plus 8 letter word VETERINARY SURGEONS
I've seen this crossword clue in The Guardian
V
E
T
E
R
I
N
A
R
Y
S
U
R
G
E
O
N
S
Buddy explains!
The straight part
We know that "Dogs might see them" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dogs might see them = veterinary surgeons.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.