"We still have some way to go in terms of improving these [performance] metrics and delivering them consistently to our shareholders," he said in a statement.
Building on last year's success, the implementation of Blue Sky's strategic plan continued to make significant gains for the business, exceeding targets set two years ago, he said.
Blue Sky employs more than 350 people, including marketing staff in Auckland.
In March 2017, NZ Binxi (Oamaru) Foods, a subsidiary of China-based Heilongjiang Binxi Cattle Industry Co, backed out of its $25.4 million takeover of Blue Sky.
The company had missed the deadline to get regulatory sign-off from the Overseas Investment Office, and wet and cold weather at the time triggered a material adverse change in Blue Sky's finances, as it reduced stock flows and earnings were undermined.
Binxi had built its stake in Blue Sky in 2016, becoming the third-largest shareholder behind Lowe Corp and H.W. Richardson Group.
Grave said the strategic plan was a "profit gain plan" comprised of 20 focused projects within the business to advance company performance and position it on an upward trajectory.
"We're two years into the plan and we've seen the scale and profit of our business grow substantially," he said.
In July last year, Blue Sky decided to sell its unprofitable Gore plant which had been non-operational since late 2016 but, with no strong interest, it was retained to process offal from its Morton Mains plant, between Edendale and Invercargill, Grave said when contacted.
He said efficient use had been made of the Gore facility, through further processing of offal into pet food ingredients, and additional opportunities were now being explored.
The current plant capacity infrastructure at Morton Mains, which processes all the lamb and mutton over an almost 11-month season, was still constraining growth opportunities, he said.
However, additional throughput was still achieved and an $11million capital expenditure programme was now under way to address constraints and increase efficiency and improve environmental performance.
Blue Sky chairman Scott O'Donnell said the company was taking a proactive approach in addressing environmental concerns at Morton Mains and work had began on a new $3.7 million wastewater treatment plant and dissolved air filtration system.
- Blue Sky's annual meeting is on August 8 in Invercargill.