Renehan, who previously worked in the trucking game for a day job, has been around the caper for more than 30 years and prepares a small team of three at Deagon.
Rubydoo was a shrewd pick-up for the Renehan team after previously being prepared by Adam Campton at the Gold Coast.
The five-year-old mare won well at Ipswich in a fillies and mares Benchmark 58 race before placing at the Sunshine Coast and Ipswich to close her campaign in November.
Renehan has recently brought Rubydoo back into work and she is likely to trial within a month before finding a first-up assignment in early March.
“She has just come back from a spell,” Renehan said.
“When we got her, she was near the end of her preparation and we kept her going.