I am so very sorry for losing her. I just wanted to mention this.... If your rat had a difficult time drinking from her bottle due to advanced URI complications, give her Ensure in a small rounded bottom bowl. It's not easy to find the exact right style, but a flat bottomed, vertical sided type bowl is not helpful. They need something that has a "spoon-like shape so that the rat can lap up the liquid (thick consistency is what you're looking for here. Water just drips off their tongue, they need the liquid to stick to their tongue) and still be able to breathe without feeling like they are going to choke. Congestive Heart Failure (CHF) is a common disease with rats and the symptoms are not unlike URI's. Also, try to keep your rat calm and comfortable. If he has to exert himself he will not be able to supply himself enough oxygen, and that leads him to become frightened. If he continues to get more agitated, he will become frantic, running around wildly, not knowing what to do, and doing the exact worst thing possible! If you ever see this behavior, you should try to soothe him and calm him down. I have a rat who has been living solely on Ensure for almost 6 months, and hasn't even lost much weight. Granted, he spends all his time just hanging out with no moving around, but I cimfort him every day and he's never in any distress, but for one time because I bathed him, which caused him to become frantic, so he had a bout of panic and started gasping. Anyway, sorry for the long winded reply. While you await getting a SubQ setup, give him Ensure in a small rounded bottom bowl, or, a tablespoon. Also, whipped cream is always a big hit. Just about anything that works for you is good when it comes to dehydration. Good luck .