After returning home from your visit to the vet clinic, you should contact your vet without delay if you notice any of the following signs:
* Any difficulty breathing, or discomfort while breathing, rapid shallow breathing or 
deep laboured breathing.
* Blueness or paleness of the gums.
* Disorientation, stumbling or falling over.
* Reluctance or inability to rise and move about.
* Vomiting.
* Bleeding from anywhere on the body (mouth/limbs).
* Not eating, drinking or a change in demeanour (quiet/depressed).
* Dark coloured stools or urine (or blood tinged).
Any specific signs your vet may have mentioned during your visit.
In addition, some symptoms may show up after several days or weeks. These may include:
* Difficulty going to the toilet.
* Lameness.
* Any change in normal breathing pattern.