Great advice thanks2 realistically maybe 3, but with low fertility issues lower ratios is better.
These are our first dewlaps, but they are a calm/quiet breed like the sebastopols and those ganders are all bluff. We have 1 gander during breeding season I watch a little more. Its all about common sense when dealing with them. Dont corner, dont turn your back (during breeding season) and walk with a purpose around them.

Would you pen them during breeding season? Sorry for all the questions. I don't have any other geese, so cross breeding is not an issue.