SCP-XXXX is to be contained in a containment area
This part is redundant. Please specify which Site it is kept in. Also, the Foundation would probably want the cleaning and feeding to be handled by machines to reduce risks of harm. Since it seems to be domesticated, it possibly enjoys the company of humans. Personnel with permission could play just for a little bit with it once in a while as an incentive to behave well, though some readers might think the Foundation wouldn't let that. Your choice, I think.
knows a large number of commands such as 'lie down', 'play dead', 'shake hands', and 'use the loo'
I think actually saying the names of the commands is a tad unclinical, though I might be just being picky.
All personnel must be removed from SCP-XXXXs containment chamber within fifteen minutes of entering
If left exposed for longer than approximately two minutes, subjects will enter a consistently increasing state of euphoria until removed from SCP-XXXX. Subjects will become distressed if removed from SCP-XXXX, but no permanent or long-lasting effects have been found.
These two parts don't really mesh well. I would remove the second one.
Continuing review in the next post.