The Age reports that the two clubs leading the race to secure Caddy in the Gillette AFL Trade Period - St Kilda and Geelong - were surprised at the Suns' demand and won't meet it.
North Melbourne is also a strong chance of getting Caddy.
Trade Machine - have your say
Meanwhile the Suns could spring a surprise and target Hawthorn defender Stephen Gilham.
The Courier Mail suggests the Suns, in the wake of Brian Lake's arrival at Hawthorn, will target Gilham as they strive to beef up their backline.
Melbourne was the big winner on day one of trade period having secured father-son selection Jack Viney with its second-round draft pick.
The Demons are also likely to snare 17-year-old key forward Jesse Hogan through the GWS mini-draft, a deal expected to be ratified on Tuesday.
Speculation suggests it is likely to include the Demons swapping pick three and 13 and getting Hogan, pick 20 and Dom Barry from North Ballarat as a pre-listed player from the Giants.
But the Demons are facing some competition in luring the services of Collingwood forward Chris Dawes.
Gillette AFL Trade Period hub
Melbourne was optimistic of its chances of snatching the contracted forward from Collingwood's grasp, but The Age suggests the Western Bulldogs and Carlton remain in the hunt if Dawes decides to leave the Magpies.
Although St Kilda is keen on arranging a deal for West Coast defender Mitch Brown, it won't be in a straight swap for Jamie Cripps, as the Saints had hoped on Monday.
West Coast list manager Craig Vozzo told The Age the club was not resigned to losing Brown.
"We see him as an important part of our future," he said. "We see him playing for us for the next six years or more."
The Sydney Swans and Adelaide were no closer to formalising a deal for out-of-contract forward Kurt Tippett after day one of talks.
