They do look like it could be in the next month, some do look like they are starting combs, they are very pretty, though that doesn't get you any eggs. Are you still feeding them a grower, keeping up the protein content will help get them laying sooner, I personally like to cut the protein...
obviously, lol, I should look at the forum title, perhaps if you post pictures, they should be getting close to starting, sometimes the shorter days will slow down the start of laying, mine have always started by seven months.
Wyandotte are slower than other breeds to start laying, 5-7 months is not unusual, they are considered dual purpose chickens, if you want eggs sooner always get egg laying breeds.
I have found it is always cheaper to buy eggs than to expect things out of chickens, there's so many things that...