Hello Cara,
The messaging from Nova Scotia and Prince Edward Island was "no feeders at all" partly because there had been a couple of positive blue jays found , which frequent feeders. I found this information from Environment and Climate Change Canada more recently.

To minimize the risk of transmission of HPAI do not feed waterfowl, gulls or other water birds. Feeding encourages wild birds to congregate around food sources and can increase the probability of transmission among wild birds, both within and among species.

The use of bird feeders is still safe but they should be removed from areas that are open to poultry and other domestic animals. If you care for poultry, prevent contact between wild birds and poultry by removing exterior/outdoor sources of food, water and shelter that attract wild birds. Backyard bird feeders and baths should be cleaned regularly using a weak solution of domestic bleach (10% sodium hypochlorite). Ensure they are well rinsed and dried before reuse.

For regional guidelines and local bylaws on feeding wild birds, check with your provincial and municipal governments.

I hope you find this information helpful and thank you for your comment