Thank you Helen,
Now just like fractures in our own bones, the nature of the fracture is what dictates our treatment options. The worse the fracture, the less options we have and the more likely that an invasive (ie surgery) treatment will be required. Though, as in Potion's case, the more clean cut the fracture, the more options and more chance a non-invasive treatment like a split can be used to facilitate the bone healing.
Now if he has a clean break of the tibia where the edges are lying aligned, splinting the leg with a ***** ***** bandage (plus his fibula bone which lies next to the tibia will act as a splint too) is a reasonable non-invasive treatment option. That said, it does mean 4-6 weeks of wearing this bandage and being restricted in his activities (hence the dog crate).
Now if Potion is not a cat that would tolerate 4-6 weeks of strict rest in the crate while his bones quietly knit themselves and is struggling with this bandage (which is not going to be good from the point of view that we need those fractured bone edges to be lying undisturbed), then Monday morning you will want to have a serious discussion with his vet. Because while not absolutely necessary with this type of fracture, surgery may be the best option for Potion's mental health. It would still mean strict rest but if we did use surgical intervention, we'd have our "splint" (or pin) on the inside and he would have more control over this leg then he does at the moment. And I would say that if you think he will struggle with a month or two of strict rest, then it may be worth considering this option now since we'd hate to have a failure to heal using the split and wind up needing surgery (and more rest) after all.
Overall, I don't think the weekend has lead to the treatment course being used for your lad. I suspect the nature of the fracture and the intact fibula acting as a little internal bone splint has made your vet feel that non-invasive splinting (like a cast used in people) will allow the bone to heal successfully. Still if you are seeing your poor wee lad struggle and don't think he can handle 4-6 weeks of being confined in the dog crate and having bandages replaced every few days to weeks; then it is worth bringing this to his vet's attention at this stage. They can take your concerns on board and discuss alternative surgical options for this particular fracture. Or if your vet isn't able to perform the fracture repair at their practice, they can refer you to an orthopaedic specialist (either at a vet school or privately) who can assess Potion's fracture and work with you to take the best steps for him and to ensure success in his healing this fractured bone.
I hope this information is helpful.
If you need any additional information, do not hesitate to ask!
All the best,