Introduction:

Introducing new rats to an existing group requires careful planning and monitoring to ensure a smooth transition and the formation of harmonious relationships. This guide provides step-by-step instructions for introducing rats, emphasising the importance of patience, proper cage setup, and gradual integration. Following these guidelines will help minimise stress and potential conflicts among the rats.

Stage 1: Initial Interaction in a Carrier (Show tank or small animal carrier with water bottle fitted e.g. Ferplast Ceo XL, Ferplast Aladino Medium or a secure, well ventilated carrier of similar size.

• Gather all rats, including the new and existing ones, in a carrier or a closely monitored space with plenty of food at the bottom.
• Observe their interactions for approximately one hour, intervening if necessary.
• Monitor for any adverse noises or signs of aggression during this period.

Stage 2: Transfer to a Pre-Prepared Introduction Cage

• Transfer the rats to a pre-prepared introduction cage, such as a hamster cage, measuring approximately 46cm in length and 29.5cm in width. (For example, the PetsAtHome ‘Habitat 1’)
• The cage should be relatively low in height and completely bare, except for substrate, scattered food (no bowls), and a water bottle on the outside.
• Leave the rats in this cage for at least 24 hours (sometimes this stage can take upto one week), without allowing them free roam time.
• Provide regular food and water, and ensure they are getting along without any major issues.
• Expect some pinning, avoiding, and squeaking during the first few hours, and perhaps the first day too. It is common for the groups to sleep at opposite ends of the cage initially, gradually coming together in a big pile. 

Stage 3: Transition to a Furat or Alaska Cage

(Or, for example, PetsAtHome ‘Habitat 2’)

• Transition the rats to a larger cage, such as a Furat or Alaska cage, which should be similarly bare, except for substrate, food, and water.
• Consider adding a large, flat, open hammock on day after a couple of days in this stage if the rats are getting along well. However, if any conflicts arise, remove the hammock.
• Spend upto one week in this cage if necessary, ensuring the rats continue to interact positively.
• Do not rush this stage or move to the next stage.