Melbourne trainer Henry Dwyer will have runners at four venues in three states this weekend and admits it hasn't been easy finding riders.

He said the problem was compounded with feature meetings in Adelaide, Brisbane and Scone.

"It's been a nightmare trying to get someone for Snitty Kitty at Scone," Dwyer said.

"Even at Caulfield trying to find someone to ride at 54kg has been really tough."

Snitty Kitty runs at Scone chasing black-type and her third win in four starts in the Listed Denise's Joy Stakes while Dwyer has two runners at Morphettville in Adelaide, Act Of Valour and If Not Now When.

On the home front, Dwyer will send a two-year-old to the Donald Classic at Saturday's country meeting while on his home circuit at Caulfield he will have three runners.

Two-year-old first starter Tesarc runs over 1100m, Leotie will contest a benchmark 78 race for three-year-old fillies while Foreign Affair lines up in a mares handicap over 1200m.

Dwyer expects Foreign Affair to give a good account of herself back against the mares.

"She's in benchmark 78 grade against the boys but against the mares she's always competitive in open grade," Dwyer said.

"The 1200 metres is probably her right distance. She's on her home track and ideally she likes a bit of sting out of the track but she can go on anything.

"There's no reason why she can't run her best and her best is certainly good enough to run well in this sort of mares race."

Dwyer will wait and see acceptances before booking a jockey.

He said there could be a scramble for apprentice riders should the topweight Miss Promiscuity not accept which would require all other runners to rise 4kg.

Dwyer also had promising two-year-old Je Suis Tycoon nominated for the Woodlands Classic at Scone on Saturday but has decided to wait a week and run in the National Stakes at Morphettville.