Where to get Chicken Grit Near Toronto

[Threechimkens]

This is for chicks, 15$ for 7 pounds- https://www.amazon.com/Manna-Pro-10...d=1&keywords=chick+grit&qid=1611953355&sr=8-6

And for a adults- https://www.amazon.com/Manna-Pro-10...1&keywords=chicken+grit&qid=1611953715&sr=8-5
4$ for 5 pounds.

Wrong country, I’m in Canada