has he ever encountered deer before?? Maybe something new ..
I have a herd of deer that are here every day, behind my fenced in yard (husband feeds them)..my czech/ddr girl doesn't chase them, she is so used to them being around, along with turkeys,woodchucks, squirrels, rabbits IN the yard, she doesn't even bother with them..I don't consider her a wuss because she leaves them alone, but I don't think she'd back off from one that challenged her either..Not saying your boy is a wuss at all, he's young, mine is 6 years old and has basically grown up with the wildlife here, plus I have chickens she hangs with..
I wouldn't worry about it, you don't want him chasing deer anyhow, here a dog can be shot for running wildlife.
Danger Danger vom Kleinen Hain aka Masi
"Angel" Jakoda's Bewitchen Sami CD OA OAJ OAC NGC OJC RS-O GS-N JS-O TT HIC CGC
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"Angel" Jakoda's Jagged Edge