If you can wait until Monday, contact Ox Bow direct, manufacturer of Critical Care (according to Ox Bow, they do not sell Critical Care to stores but to vets and animal hospitals only ... or some people sell them on ebay), you'll need a local animal hospital or vet's name and telephone number/address when setting up your account. It's just for their internal records only. You can order it at the following:
Customer Care Specialist
Oxbow Animal Health
29012 Mill Road
Murdock, NE 68407
Tel: 800-249-0366
Fax: 402-867-3222
They can FedEx it to you. I suggest getting the Apple Banana flavor. They were really great when I telephoned them a few weeks back.
You might also contact your local animal hospital to see if they have any Critical Care available.
In the meantime, you might grind up the food pellets into a powder, mix banana baby food (no preservatives) with a little Gatorade or pure apple juice into a 2 liquid:1 powder ratio. Basically a gruel. If you can't get a hold of a Monoject 412 dental oral hygiene (non needle syringe) or you can use an eye dropper until you can get the Monoject (at your local dentist). Cut the tip off of the Monoject as it is too narrow. Be sure to be "extra careful" feeding your Hemi not to aspirate and take your time. Try to let your Chin lap it up if all possible. Be sure that the formula is room temperature.
When feeding, wrap your Chin like a burrito in a towel. Try to keep their front paws down with the towel as they will try to shoo you away. I find lying her on her back slightly while rubbing her ears back during feeding calms them down. It does get messy until you get use to it.
I've got a sick Chin and been hand feeding her for the past week and she's improving.
Good luck and hope Hemi gets well quickly.