Suffocation or Asphyxia can be due to an excess in feeding as well as a respiratory disorder.
Canary is agitated and with signs of intense body heat. The first step is to take it to a calm, warm and dry environment, and to provide it with sufficient green leafs, birdseed and fresh water. Since suffocation can be due a respiratory disorder, which can be congenital or acquired, it is convenient to visit the veterinary.