Okay, I've asked the local petshop if they could bring in the rat food but no luck. I've found a supplier of the Envigo brand here and sent them a message to see if I can order it from them. I've asked the exotic petshop if they could order the Mazuri brand and they said they'll get back to me. Sooo just praying I can get one soon as they're fussing with milk and wanting solids, but I want to make sure they eat their nutritious food first.
I bought some full fat plain yogurt for the squirrels. I mixed it with a bit of their formula separate from the main lot as I wanted to try them out first. They didn't really like it but they each had 0.5ml of the mixture anyway. I saw you could add vanilla extract to make it taste better but I only have the synthetic stuff so I wasn't sure. I'll keep trying them with it and hopefully they'll just take it.
I'll see how they go with the yogurt first then try the whipping cream. Can the whipping cream have emulsifiers etc or does it need to be just milk?