ANGUS producer Brian Mobbs has aired concerns about the growing number of new beef breeds.

"There's a lot of competition out there, and they (the other breeds) are catching up," says the High Spa Angus stud master.

The competition to which Mr Mobbs was referring were the many new brands of breed specifically labelled beef.

"You can take a black Simmental cross and label it Angus and how would you know," he said at Daylesford Beef Week field day last week.

A strong supporter of the Certified Australian Angus Beef program, Mr Mobbs said he remained optimistic for the Angus breed.

High Spa displayed for private sale 30 yearling bulls as well as yarding 10 rising two-year-old in-calf heifers in the Beef Week Heifer Challenge on the weekend.

At Barfold, north of Kyneton, Alvio Trovatello, of the Glendan Park Hereford Stud, had an impressive display of 28 sale bulls including his Wodonga National team.

Mr Trovatello reported private sales from $2000 to $8000.

At Sunbury, Ian Burnside, of the Cratloe Murray Grey stud, reported a quiet day, putting it down to the hot weather and the limited interest in the Murray Grey.

"They have a great temperament and great carcasses, but unfortunately the breed had not been able to promote itself like some of the other breeds," Mr Burnside said.

Cratloe calves down 38-40 cows a year and sells 16-18 bulls at $2000 plus.