Fish Really is Brain Food. A protein source linked to a great brain boost is fish -- rich in omega-3 fatty acids that are key for brain health.
new returning rats quarantine time frame the absolute minimum quarantining for bringing rats in is 14 days this covers the acquisition of new rats or the return of resident rats to the colony after exposure to other rats shows co breeding returned placements etc
1 Rats are pregnant for 21 to 25 days, they can have them as early as 21 days on occasion they may go as long as 28 days.  Some people swear they have babies every 21 days, mine typically have them at 25 days.