We rescued a squirrel a few years back and as of late my husband has been wanting a pet rat(s).

Is it safe to have a rescued squirrel with a pet rat(s) if they are housed separately in the same household? The squirrel is both inside and out with two superset enclosures.

They would roam the same home at separate times.

We got a pet rat but rehoused to a family member the same night before bringing home due to seeing an article that said it was a risk due to diseases rats can carry. We didn’t even think about this until we thought about housing them near one another and looked into it on google.
Is this the case even with pet rats from a pet store carrying disease. Is it a gamble, if so we don’t want to ever risk it.
Curious and looking for info to be safe on it all and any future thought about rats.

Thank you in advance!