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Former Scotland rugby international Craig Chalmers is calling for more drug testing in Scottish rugby.

And Chalmers, whose son Sam was banned in 2013 for two years after failing a doping test, believes there needs to be better education of players.

"The testing isn't as widespread as it should be," he told 91�ȱ� Scotland.

"I'm not saying everyone's doing it but a number of guys will be experimenting. It's a case of educating the coaches and the fitness guys."

Melrose back Sam Chalmers failed a doping test at a Scotland Under-20 training session two years ago and admitted to taking two anabolic steroids.

Last month, he told the 91�ȱ� that, while he did not take an illegal substance, it was one that was "illegal in rugby" and that putting it in his body was the "worst mistake" of his life.

Now, as he nears a return to playing with Sydney club Southern Districts, his father has warned that the problem still exists in Scotland.

"Top-level players get tested regularly, I would say, age group rugby every now and again; but it's at the lower levels, the guys at the clubs, I wouldn't use the word rife but it is going on," he said.

"Players want to play for Scotland, Edinburgh or Glasgow. If they are not big enough or strong enough, the big thing is you've got to work hard.

"Sam made a very, very poor decision. He has lived with that for the last 23 months and is just about to come out of that."

In a statement, Scottish Rugby said it is "fully committed to the fight against doping in sport in order to protect the integrity of the game".

It says it has "two anti-doping educators, who will be hosting roadshows, starting next season, at clubs and schools throughout the country to educate and inform on the risks of illegal performance enhancing drugs".

The former British and Irish Lion praised the efforts of his former club Melrose in dealing with the problem, saying they take the issue seriously, but thinks more could be done by Scottish Rugby.