Night vision pointers please

[Midnitemo]

I'm finally getting round to addressing my lack of night vision technology , the need arises for dog walking purposes , my terrier "Charlie" has spent the last two winter's with various light's dangling of him so he can be spotted whilst walking after dark , he has wrecked or lost so many I think I need a diffnerent tack I also worry he will get caught up by some them and trap himself or worse! So I think it is time to try a night vision monocular , tis also a sneaky way of adding a use full piece of kit to the preps , i want fairly compact(pocket sized) run of regular batteries not the button type and preferably a brand i've heard of but not mega expensive , one last thing should I be only looking at digital or are the older gen 1 light intensifies wort considering?