Thank you for your replies. Gosh didn't realise they could be that much. They aren't fertile as I shouldn't have a gander. I mean shouldn't as I was supposed to have 4 females, although one died shortly after we had her. I know that Nellie the smaller Embden is laying as we caught her one afternoon when she went missing. When she was growing up we kept laughing at her because she didn't sound the same as the other 2. it seemed she couldn't find her voice, making all sorts of funny squeaky noises.
Tilly the Toulouse, her character is she shouts and hisses a lot and she sticks her neck down and charges. She also likes Nellie.
Ellie the larger Embden is a bit in between, not as bad as Tillie but doesn't hiss. Those two always stay behind Tilly. If you feed a bit of bread, Tilly will take it but not the other two, but that may be down to Tilly.
The other worrying thing, just lately there is single deep honk but can't catch who is doing it.
Tilly has a white tip on her beak and I read somewhere on the web that Toulouse Ganders are v shaped underneath and this picture certainly showed that and a goose has more and flatter at the back. Tilly is a bit like that.
Maybe I am worrying for nothing but I nearly got a gander last year, wouldn't want three.
Yvonne