Boyd, who scored 164 goals across spells with Killie and Rangers between 2001 and 2010, re-signed before Saturday's 1-1 draw with Aberdeen at Rugby Park in the Clydesdale Bank Premier League.
"It was great to get him in and it's great to have that type of person back in the squad," said Shiels. "He will be back in with us on Monday and we will work from there. It's self-explanatory what he will bring to us - he is the top scorer of all time in the SPL (era).
"There's a hunger there and I can see that, I think he's an excellent professional who has served the game well and we are excited about that."
Kilmarnock were fortunate to claim a share of the spoils against the Dons. Rory Fallon's brilliant volley gave Aberdeen the lead they deserved before Paul Heffernan got Kilmarnock back on terms five minutes before half-time.
Aberdeen passed up a number of good chances to grab a vital second goal and were denied a penalty with 15 minutes remaining when Kilmarnock goalkeeper Cammy Bell appeared to foul Niall McGinn in the penalty area.
Shiels would not be drawn on the controversial decision, saying: "I'm trying very hard to discipline myself not to speak about referees. I'm not allowed to speak about referees and I'm not allowed to speak about other teams because they'll fall out with me."
Aberdeen striker McGinn was baffled after receiving a yellow card for diving in the incident. "In my own eyes and in the eyes of a few of the Kilmarnock players too it was a stonewall penalty - I think the referee was the only person inside the ground that didn't think it was a penalty," said McGinn.
"I was chasing the goalkeeper down and he took a bad touch, I thought I was going to raid him then he brought me down. You just have to get on with things, being a professional footballer you just have to get on with things."
The Dons now face a crucial encounter against Ross County on Tuesday evening and the Northern Ireland international said: "We played well against Kilmarnock and we have to take that into our game against Ross County. Hopefully on Tuesday we can take our chances."
- Sports & Recreation